Motor



E. G. GARTIN April 24, 192s.-

MOTOR Filed April 23, 1919 2 fihheets-sheei- 1 In/v zi a G r36 0, I

E. G. GARTIN I MOTOR Fi led April 23. 1919 2 Shegts-Sheet 2 lam z;

Fatented Apr. 24, 1 928. I i

T -ES UNIT E D v 'PFATENTVOFF 1,667,699 ICE. 1

i moron.

Application filed April 23, 1919. Serial N0. 292,092.

This invention relates to motors and more especially to the percussive type of motors commonly used in drilling rock-and other materials. I i a One object of the present invention is to provide an improved motor. Still another object of the present invention is to provide an improved means for supplying cleansing fluids to the tool actuated. by the motor. Still a further object of the present inven-' tion is to provide an improved means for controlling the cleansing fluid whereby the flow of cleansing fluid may be instantaneously regulated to remove obstructions from the steel actuated by the motor or from the hole' being drilled. These and other objects and advantages of my improved construction will, however, hereinafter more fullyappear. r

In the accompanying drawings I have shown for purposes of illustration two embodiments which my invention may assume in practice. 7

In these drawings,- Fig. 1 is a longitudinal sectional view taken substantially on the line 1-1 of Figs.

2 and '3 through the rear end of a cylinder provided with my improvement.

Fig. 2 is an elevation of the rear cylinder head shown in Fig. 1 taken fromthe right hand side thereof. 1

Fig.8 is an end elevation of the same head'taken fromthe left hand side thereof.

Fig. 4; is a. longitudinal sectional view taken substantially on the line l4 Fig. 2.

Fig. 5 is an end elevation similar to that shown in Fig. 8 but of a modified form of I V on its outer end a nut 2'O by means of which my improvement.

Fig. 6 is a longitudinal sectional view thereof taken substantially on the line 66 Fig. 5. Fig. 7 is another longitudinal sectional view taken substantially on the line 77 Fig. 5

In the illustrated embodiment of myinvention shown in Figs. 1 to 4 inclusive, 1

have illustrated in my improved construc tion, a cylinder 1 having a piston 2 reciprocabletherein, the latter preferably having a to receive a cleansing fluid conducting means, as will hereinafter more fully apposition on the cylinder 1' by side rods passing through openings 6 in the cylinder head and having heads-5 ,as is clearly shownin Figs.2and3.f

The cleansing fluids are, in the :form shown in Figs. 1 to 4, preferably conducted to the motor by an inlet pipe 7 which, as shown, is attached centrally to thelrear of the. cylinderxhead, and an inlet pipe 8 communicating with a controlling valve 9,- the latter being operable through manipulation of a controlling handle 10 which rotates the valve in a sleeve. or bushing 11. The pressure fluid which actuates the motor may be supplied to the motor in a variety of Ways, but in the form shown herein, this fluid is admitted'from the interior-of the valve. 9 througha passageway 12 to an annular cham her 13, the latter 1n turn communicating a with a plurality of longitudinal inlet passages 14 1 which communicate with ports opening in the cylinder,- the latter not being shown herein as they form no 'part'ofthe present invention.

, I preferably providemeans for permitting a part of the pressure fluid to flow to the cutting'tool to clear the cuttings there'- from, and for this purpose, I provide in the controlling valve 9 a port 15 communicating with a groove 16, the latter incertain predetermined positions of the valve communieating with the port 17 inthe valve sleeve 01'' bushing 11 to permit a flow of pressure fluid .therethrough to .a 'valve chamber 18 also mounted in the cylinder 'head ;4. Mounted in this valve chamber is a valve bushing or sleeve 19 having a threaded'connection with the cylinder and having formed outer-end thereof. When the push button is in the position illustrated in Fig. 1, fluid pressure flow from the valve chamber 18 may be entirely stopped by this valve memher, but I preferably provide a restricted passageway, such as a groove 23 between the valve member and the bushing within which it reciprocates for permitting a limited flow ofipressure fluid past the: valve. This restricted passageway communicates throughsuitable ports 24Vwith an annular recess 25 formed between the valve bushing'and' the cylinderhead. The hollow interior 260i this valve communicates through suitable ports as shown with an annular recess 27 formed between the valve member and the valve bushing in such a manner that as the push button valve is forced inwardly, the fluid from the valve chamber 18 will flow through the hollow interior 26 of the valve to the annular recess 27 and therefrom to the annular recess around the valvebushing, these ports and recesses being of such size that when they are in communication as just stated with the recess 25,a relatively large quantity of pressure fluid will be permitted to flow therethrough. If desired, a spring may be provided for retaining the valve normally in a closed position as shown at'Fig. 1, but inasmuch as the pressure oi the fluid actingon the inner end of the valve is sutficient forthis purpose, 1 preferably do not use this resilient valve seating means. The recess 25 is always in communication through a passage 28 with an annular recess 29 formed between a gland plug 30 and the cylinder head into which this gland plug is fastened as by a threaded connection therewith.

The cleansing fluids are preferably conducted by a plurality of tubes 31, 32 mount ed coaxially with the cylinder and passing through the aperture in the piston to the drill steel in a manner similar to that dis- I closed in the U. S. patent to G. H. Gilman,

' this means consists of a sleeve 33 which is normally pressed toward the rear end of thecylinder by a spring 34, the spring also serving to maintain a packing earrled within the sleeve 33 compressed so as to provide a tight joint between the different parts. Taking up'the parts in the order in which they are assembled in thesleeve 33, a compressible washer 35, made of leather, rubber or other suitable material, is inserted in the sleeve 33 and againstthis washer is placed an annular :tube supporting sleeve 36 having a conical face to receive the upset end of the outer tube 31 which is then inserted in the sleeve, the tube and sleeve preferably having radial ports or passages 37 communicating with an annular recess 38 around sleeve 36, this recess in turn communicating through radial ports 39 with theannular recess 29, thereby establishing communication between the valve chamber 18 and the interior of the outer tube 31. Abutting against the flanged end of the tube 31 is a packing ring herein shown as a steel sleeve or bushing l0 having a face fit with an end'of this tube and having adjacent its opposite end, a beveled surface to receive the rear end of the inner tube 32, the latter together with the bushing l0 hav: ing a face fit with the base of a socket formed in the gland 30 in which socket the sleeve33 and the parts carried thereby are held by the spring 34 when the parts are assembled as shown. The liquid supplied to this inner tube flows from the water tube 7 through the'inner tubev 32 to the steel and that when the controlling valve 9 is turned to admit pressure fluid to the valve chamber 18, a limited quantity of pressure fluid will flow through the outer tube '31 and will mix with the water at a point at somedistauce from the rear head of the cylinder thereby preventing a flow of water from the water inlet to the air inlet should the Water pressure be greater than the air pressure. If, during the operation of the tool, the cuttings are not properly cleaned from the hole, an additional supply of pressure fluid may be used for this purpose by merely depressing the push button valve 21, the ports and passages communicating with this valve being large enough to permit suflicient flow of pressure fluid to remove these cuttings at once and thereby permit an efficient operation of the tool. i

In the form of my improvement illustrated in Figs. 5, 6, and 7, 1 preferably provide a single primary controlling means for the plurality of cleansing fluids delivered to the bit. conical valve 44-. to which the compressed air is conducted by a pipe 45 and the water by a pipe 46, the flow of air through the valve being controlled by a port 47 passing radially through the wall of the valve and the flow oi: water being preferably controlled by a groove. 5 8 formed in the outer wall of the valve and spaced longitudinally from the air port 4:7. The air and water are conducted through separate ports 49 and 50 to a fluid conducting means extending from the rear head to the bit.

In this form of my improvement, I preferably use but a single conducting means,

This controlling means consists of a til) lllll ill) such as a tube 51 extending through the axial aperture in the piston, this tube' being attached to a bushing 52 clamped between the bottom face 53 or asocket formed in the cylinder head and a gland plug 54,'the latter having a threaded connection with the cylinder head and carrying suitable packing means 55 to prevent leakage past the gland plug.

ing a valve head SZreciprocablymounted in a socket or chamber in the gland plug54, the valve preferably having an axial aperise (iii

ture 59 and a port 60 adapted to receive compressed air and deliver'the same to the tube 51 when the valve is in a'predetermined position in the gland plug. This push button 5 valve is preferably held in the retracted position by a spring 61, but is movable under pressure appliedv to the'valve' button 62 to control the mixture of the cleansing fluids which may be admitted to the tube51. The flow of air from the air passage 49.t0 the port 60 is preferably through a plurality of annular recesses 63, 64 formed in the plug and connectedby a series'of radial ports 65 extending between these recesses, the latter recesses surrounding the stem of the valve and communicating with the interior thereof through the port 60 only when the valve is forced forward. The water passage 50 nor mally comn'mnicates with the water tube 51 through an annular recess 66 formed on the outside of the gland plug and a plurality of radial ports 67 which connect this recess with the socket 58 formed in the interior of the gland plug 54.

In the operation of .tlllS form of my improvement, when the valve 44: is turned, water and air are admitted simultaneously to the passageways 49 and 50, but the air flow is cut oft by the stem of the valve, the water being permitted a free flowthrough the above named passages to the tube 51 and therethrough to the steel to clear the cuttings l rom the hole. It the tube or steel should become clogged or should the move' ment of the mudaround the cutting tool become sluggisln the push button valve'should be operated to admit a small quantity of pressure fluid to the tube 51 and thence to the bit to clear away the cuttings, or the valve may be depressed further to cut off the ports 67 and permit a tree flow through the port 60 and thereby admit a relatively large flow of: compressed air to the bit and supply sufficient pressure fluid to the cutting tool to quickly blow away any obstructions in the hole being drilled.

It will be noted that in my improved motor, I have provided ameans for controlling the flow of a plurality of fluids to the cutting tool and have supplemented this controlling means with a second controlling quantity of compressed air Th6 valve shown for these purposes is spring pressure and the valveiseasily operate'dby thumb orfinger, and the degreeot opening the valve may easily be regulated by the movement ot'the button headof the valve. It should also be noted that Ihavc may easily be withdrawn from the motor or tool through the rearend of the rear cylin- I der head without otherwise disassembling the motor.

lVhile I have in this application spec fically described two embodiments which my invention may assume in practice, it Is to be understood that these forms are used for illustrative purposes only and that the invention may be modified and embodied in. various other tormswlthout depart-mg from its spirit or the scope of the appended claims.

\Vhat I claim as new and desire to secure by Letters Patent is: v p

1. In av rock drill, a stationary, means for conducting a flow of cleansing fluid to a drill steel, valvular means operable to vary the flow of cleansing. fluid thereto, and means providing a cleansing fluid leak pasalways open even when said valve is in its normally closed position thereb to allow flow of cleansing fluid automatlcally to said steel whenever a sourceof pressure fluid has communication with said valvular means.

2. In a rock drill, stationary neans for conducting a flow ot'cleansing fluid to a bit, means providing a cleansing fluid passage including valvular means adapted to limit fluid flow therethrough and inoperative to close said passage means thereby to allow flow of cleansing fluid automatically to said a steel whenever a source of pressure fluid has communication with said valvular means, and means whereby said valvular means is operable from the rear of said drill to supplement the How of cleansing fluid.

3. In a tool, means for conducting a flow of cleansing fluid to a bit, and means comprising a push button valve havingv a leak passage therein normally restraining the fluid flow therethrough to a relatively small quantity, said valve having means whereby when it is actuated flow of cleansing fluid to the bit may be varied while fluid flow through said leak passage is maintained.

4. In a tool, acylinder, an apertured piston therein, a cleansing fluid conducting tube extending through the piston,-means for controlling the vflow of fluid to said tube, and supplemental means for controlling the flow of cleansing fluid comprising a member normally biased to a position such that a small supply of cleansing fluid is conducted to said tube and movable in a direction v parallel to said tube to increase the supply of cleansing fluid thereto.

5. In a drilling apparatus, a hollow drill 5 steel, a motor comprising a cylinder and a catingwith said hollow steel, passage fol-1ning means communicating With said tube, passage formingmeans communicating with the source of fluid supply, a ported valve adapted to connect said passage forming means via the ports thereof, and a constantly open passage passing around said valve connecting said passage forming means.

In testimony whereof I affix my signature.

ELMER enoaen GARTIN. 

